#428DD8#428DD8

#428DD8 is a light, vivid cyan. Relative luminance 0.252; OKLCH L 63.1% C 0.136 H 250.9°. Best body text is #000000 at 6.03:1 contrast (WCAG AA passes).

Color values

HEX	#428DD8
RGB	rgb(66, 141, 216)
HSL	hsl(210, 66%, 55%)
HSV	hsv(210, 69%, 85%)
CMYK	cmyk(69.4%, 34.7%, 0%, 15.3%)
CIE-LAB	lab(57.23, 1.07, -45.14)
CIE-LCH	lch(57.23, 45.15, 271.36°)
OKLab	oklab(63.07% -0.0445 -0.1282)
OKLCH	oklch(63.07% 0.136 250.9)
XYZ	xyz(24.1617, 25.1633, 68.5361)
Luminance	0.2517 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DD8 #D88D42

analogous

#42D8D8 #428DD8 #4242D8

triadic

#428DD8 #D8428D #8DD842

tetradic

#428DD8 #D842D8 #D88D42 #42D842

square

#428DD8 #D842D8 #D88D42 #42D842

split-complementary

#428DD8 #D84242 #D8D842

monochromatic

#1B5084 #266EB7 #428DD8 #75ACE2 #A7CAED

Accessibility & contrast

On white

3.48

#428DD8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.03

#428DD8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DD8

6.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DD8	#FFFFFF	#000000	##000000
##428DD8	1.00	3.48	6.03	6.03
#FFFFFF	3.48	1.00	21.00	21.00
#000000	6.03	21.00	1.00	1.00
##000000	6.03	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B91DB

Deuteranopia (green-blind)

#5683D7

Tritanopia (blue-blind)

#009FA8

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #428dd8;
/* rgb */ color: rgb(66, 141, 216);
/* oklch */ color: oklch(63.1% 0.136 250.9);

Tailwind

colors: {
  custom: {
    50: '#87aee4',
    500: '#428dd8',
    950: '#000000',
  },
}

SCSS

$custom: #428dd8;
$custom-light: #87aee4;
$custom-dark: #000000;

JSON

{
  "hex": "#428dd8",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 216
  },
  "hsl": {
    "h": 210,
    "s": 65.789,
    "l": 55.294
  },
  "oklch": {
    "l": 0.63072,
    "c": 0.13568,
    "h": 250.9
  },
  "luminance": 0.25166
}

Semantic roles & 50–950 ramp

primary

#428DD8

secondary

#DABB9C

accent

#943FE9

background

#F8FAFE

surface

#F0F4FC

border

#CBCED5

text

#0D1015

muted

#7D7F84

Preview Lab

Preview with #428DD8

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →